Head cushion



FIG. 1 is a perspective view of my head cushion;

FIG. 2 is a left side elevation view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a rear elevation view thereof; and,

FIG. 6 is a top plan view thereof.

The broken lines shown in the drawings illustrate features of the article that form no part of the claimed design. 

CLAIM The ornamental design for a head cushion, as shown and described. 